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CNET News: Education Software Firm OKs Open-Source Patent Use

"Blackboard, whose software can be used to manage university
courses, has taken a significant step to mollify open-source rivals
who perceive a patent threat from the company.

"Blackboard pledged Thursday not to use its current and pending
patents against open-source alternatives. The pledge also extends
to in-house 'home grown' course management software developed by
schools themselves, software that handles chores such as tracking
grades or distributing quizzes..."